You will need a customs or quality inspection certificate that you have recorded yourself for High Collar Knurled Rolling Nuts, which we can provide free of charge when you place your order. we can provide it free of charge when you place your order. The certificate has no fancy content, just the necessary basic info.
It includes details like batch number, raw material type, surface treatment method, and key test results. Those tests cover thread accuracy, size consistency, and corrosion resistance data from relevant experiments. Each certificate has a unique traceability code, so you can verify its authenticity and check the test details if needed.
The document uses plain language, no complicated technical terms. It meets common industry standards and is recognized for most international shipments. Just let us know you need it when ordering, and we’ll include it with your High Collar Knurled Rolling Nut delivery. No extra fees or tedious procedures for this service.
It’s mainly used to add threaded holes to thin sheet metal without extra nuts. You’ll find it in electronics manufacturing—like mounting components onto device casings or fixing metal panels on computers and printers. It works here because it sits flush, not taking up extra space inside the devices.
It’s also common in furniture assembly. Workers use it to attach metal brackets to cabinet frames or secure drawer slides to metal rails. In small workshops, it’s handy for custom sheet metal projects, like building tool boxes or metal shelves that need strong, reliable fastenings.
DIY enthusiasts use it too, for tasks like repairing metal garden tools or making small metal crafts. It’s great for any job where you need a threaded hole in thin metal but don’t want to weld or use bulky hardware. High Collar Knurled Rolling Nut fits most light to medium sheet metal fastening needs, no extra hassle with complicated tools.
Q:What if some products are defective after delivery?
A:First, take photos or videos of the defective products and send them to us within 7 days of receipt. We’ll check the issue quickly. If it’s a quality problem from our production, we’ll send replacements for free. The replacement shipping cost will be covered by us. We rarely have such issues because each batch goes through strict inspection, but we’ll handle after-sales properly to avoid affecting your use.
| size | Pitch | Outer diameter | Height | k | ds | da | d1 | T | h | ||||
| max | min | max | min | max | min | max | min | max | |||||
| M3 | 0.5 | 11 | 10.7 | 7 | 6.64 | 2.8 | 6 | 5.7 | 3.5 | 3.2 | 5.2 | 2 | 1.2 |
| M4 | 0.7 | 12 | 11.7 | 8 | 7.64 | 3 | 8 | 7.64 | 4.5 | 4.2 | 6.4 | 2.5 | 1.5 |
| M5 | 0.8 | 16 | 15.7 | 10 | 96.6 | 4 | 10 | 9.64 | 5.5 | 5.5 | 9 | 3 | 2 |
| M6 | 1 | 20 | 19.7 | 12 | 11.6 | 5 | 12 | 11.6 | 6.56 | 6.2 | 11 | 4 | 2.5 |
| M8 | 1.25 | 24 | 23.7 | 16 | 15.6 | 6 | 16 | 15.6 | 8.86 | 8.5 | 13 | 5 | 3 |
| M10 | 1.5 | 30 | 29.7 | 20 | 19.5 | 8 | 20 | 19.5 | 10.9 | 10.5 | 17.2 | 6.5 | 3.8 |